Sergey Tihon's Blog

F# Weekly #41, 2013

14/10/2013F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

Video/Presentations

“F# Eye for the C# Guy” by Phil Trelford
“F# for C# devs” by Mathias Brandewinder

Blogs

Anthony Brown shared “Making a platformer in F# with MonoGame“.
Phil Trelford wrote about
- “Autumn F# Events 2013“.
- “5 lesser known F# testing tools & techniques“.
Luke Sandell posted “XML Transformations with F#“.
Danny Warren wrote “C# to F#: My Initial Experience and Reflections“.
Neil Danson shared
Jon Harrop posted
- “Fun with infinite power series“.
- “Removing image borders“.
- “Scribble app in 12 lines of F#“.
- “A thread-safe object cache that doesn’t leak“
Kit Eason blogged
- “You’re looking a little flushed“.
- “Calculating cumulative binomial distribution probability“
Matt Ball published “Adopting F#, Part III“.
Richard Dalton posted “Learning to think Functionally -> Why I still don’t understand Single Case Active Patterns“.
Tsunami blogged “Classifying Digits with Deep Belief Nets – Tsunami Sample“.
Isaac Abraham wrote “Trying F# – are you a developer or a mouse?“.
Onorio Catenacci shared “F# Tip Of The Week (14 October 2013)“.

That’s all for now. Have a great week. Previous F# Weekly edition – #40

F# Weekly #40, 2013

07/10/2013F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

FlexSearch (new F# based open source search engine) was announced.
FAKE has updated documentations.
Do not miss F# Community Projects list.
A new version of F# charting on NuGet, now with better handling of dates.
Foq 1.2 was released on NuGet.
F# interactive in Sublime works on Mac.
“The results speak for themselves.” – a new F# testimonial.
FAKE is looking for testimonials.
WebSharper IRC channel was announced.
Interesting Excel type provider with external schema definition written in F#.
FsCoreSerializer is renamed to FsPickler.
{m}brace presented their team.
Detroit FSharp group was created on LinkedIn.
WebSharper 2.5 includes WebGL bindings.
Chris Holt have ported code from functional composition presentation to F#.

Blogs

Phillip Trelford posted “Functional Game Jam: Platform recommendations“.
Onorio Catenacci shared “F# Tip Of The Week (30 September 2013)“.
{m}brace published “PLOS ’13 follow-up“.
Onorio Catenacci blogged “Functional Programming Makes Simple Easy“.
Tsunami wrote about “Who is Tsunami for?“.
Mark Seemann wrote “How to create a pure F# ASP.NET Web API project“.
Anton Tayanovskyy blogged “WebSharper vs FunScript“.
Mark Seemann posted “Running a pure F# Web API on Azure Web Site“.
Isaac Abraham posted “A refresher on Async“.
Boris blogged “Computing Self-Organizing Maps in a Massively Parallel Way with CUDA. Part 2: Algorithms“.
César López-Natarén wrote “Introduction to F#“.
The .NET Team blogged “RyuJIT: The next-generation JIT compiler for .NET“.
Joseph Rickert wrote about “R and Data Week 2013“.

That’s all for now. Have a great week. Previous F# Weekly edition – #39

F# Weekly #39, 2013

30/09/201330/09/2013F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

The language currently sits at No. 26 on the latest TIOBE Index of the most popular programming languages, ahead of other functional programming languages such as Erlang (36), Scheme (37), Scala (42), Haskell (46) and ML (48) (reed more).
Kaggle are using F# for their most complex simulator (Flight Quest 2), a $250,000 competition running over several months.
Some progress on documentation for F# Data Frame libraries (Using improved FsHtmlDoc).
New idea was proposed on VS User Voice: “Allow n partitions for ActivePatterns” (Vote if you like it).
FAKE uses FSharp.Formatting for automatic docs generation.
LIBLINEAR 1.92 (linear classifier for data with millions of instances and features) is available for .NET users (F# sample).
F# syntax highlighting to TextMate can come soon.
One more proof of F# freedom from bugs.
Take a look at the Fog library (Azure APIs wrapper for F#) if you missed it.
Amazon S3 API sample was shared.
Houston TX Functional Programming User Group was announced.
Type Providers came to Idris:
- “Looking Outward: When Dependent Types Meet I/O” by David Raymond Christiansen
- “Dependent Type Providers” by David Raymond Christiansen

Videos/Presentations

“Why Hymans Use F#” by Keith Harrison.
“The Future Of Standard ML” by Robert Harper.
“F# IN FINANCE” by Phillip Trelford.
“F#unctional Londoners Meetup Group: Enticify” by Ben Taylor

Blogs

Vasily Kirichenko blogged “STM: F# vs Haskell“.
Jack Fox posted “The Great New York F# Expedition of 2013“.
Nikos Baxevanis published “Auto-Mocking with Foq and AutoFixture“.
Troy Kershaw wrote about “F# syntax highlighting with Docpad and Highlight.js“.
Michael Newton posted “Implementing Classic OO Style Code in F#“.
Phil Trelford shared “Pacman Kata at Progressive F# Tutorials NYC 2013“.
Darryl Taft wrote “Microsoft’s F# Gains Momentum“.
InfoQ published “What’s Your Next Language on the Javascript Platform?“.
Neil Danson posted “SpriteKit and Physics in F#“.
Jon Harrop wrote “A look at the IronJS source code“.
Inside Microsoft Research published “Programming Contest Yields Surprising Results“.
Phil Trelford wrote about “Progressive F# Tutorials NYC 2013“.
Boris blogged “Computing Self-Organizing Maps in a Massively Parallel Way with CUDA. Part 1: F#“.
Jon Harrop posted “Predator Prey sample revisited“.
Jon Harrop posted “F# for Visualization 0.7 released“.
Sergey Tihon blogged “Dropbox for .NET developers“.
Dave Thomas posted “Adding Touch to SpriteKit“.

That’s all for now. Have a great week.

Previous F# Weekly edition – #38

Some days ago, I was faced with the task of developing Dropbox connector that should be able to enumerate and download files from Dropbox. The ideal case for me is a wrapper library for .NET 3.5 with an ability to authorize in Dropbox without user interaction. This is a list of .NET libraries/components that are currently available:

Sprint.NET and Xamarin component are not my options for now. DropNet also does not fit my needs, because it is .NET 4+ only. But if your application is for .NET 4+, then DropNet should be the best choice for you. I chose SharpBox, it looks like a dead project – no commits since 2011, but nevertheless the latest version is available on NuGet.

At the beginning, you need to go to Dropbox App Console and create a new app. Click on “Create app” button and answer to the questions like in the picture below.

When you finish all these steps, you will get an App key and App secret, please copy them somewhere – you will need them in future. Now we are ready to create our application. Let’s create a new F# project and add AppLimit.CloudComputing.SharpBox package from NuGet.

After package is downloaded, go to packages\AppLimit.CloudComputing.SharpBox.1.2.0.542\lib\net40-full folder, find and start DropBoxTokenIssuer.exe application.

Fill Application Key and Application Secret with values that you received during app creation, fill Output-File path with c:\token.txt and click “Authorize”. Wait some seconds(depends on your Internet connection) and follow the steps that will appear in browser control on the form – you will need to authorize in Dropbox with your Dropbox account and grant access to your files for your app. When file with your token will be created, you can click on “Test Token” button to make sure that it is correct.

Using token file, you are able to work with Dropbox files without direct user interaction, as shown in the sample below:

open System.IO
open AppLimit.CloudComputing.SharpBox

[<EntryPoint>]
let main argv =
    let dropBoxStorage = new CloudStorage()
    let dropBoxConfig = CloudStorage.GetCloudConfigurationEasy(nSupportedCloudConfigurations.DropBox)
    // load a valid security token from file
    use fs = File.Open(@"C:\token.txt", FileMode.Open, FileAccess.Read, FileShare.None)
    let accessToken = dropBoxStorage.DeserializeSecurityToken(fs)
    // open the connection
    let storageToken = dropBoxStorage.Open(dropBoxConfig, accessToken);

    for folder in dropBoxStorage.GetRoot() do
        printfn "%s" (folder.Name)

    dropBoxStorage.Close()
    0

F# Weekly #38, 2013

23/09/201304/10/2013F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

F# support will be standard part of Xamarin studio (not a plugin).
New F# Refactor integration in FSharpBinding.
Phillip Trelford presented Mario jumps on FunScript (source code)
TsunamiIDE updated the run button.
Monodevelop 4.1.9 was released on Gentoo.

Videos/Presentations

“Linear Data Structures” by Jack Fox. (slides)
“FSharp Agents” by Rachel Reese (slides and code)
Episode 283: Rachel Reese on F# Agents
“F# Server-side programming” by Dave Thomas.
“F# in the enterprise” by Dave Thomas.

Blogs

Isaac Abraham wrote “Lightweight callsite caching with F# and C#“.
EFYTimes.com posted “10 Programming Languages That Will Change The IT World“.
Don Syme wrote about “A New F# Meetup – The Paris F# Group“.
Michael Newton blogged “Teaching F# to C# Devs“.
Tomas Petricek posted “How many tuple types are there in C#?“.
Nicolas wrote about “Continuation Passing Style“.
Neil Danson posted “Simple SpriteKit demo in F#“.
Dave Thomas blogged “Spritekit Particle Fun“.
Jon Harrop wrote about “Downloading stock prices“.

That’s all for now. Have a great week.

Previous F# Weekly edition – #37

F# Weekly #37 2013

16/09/2013F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

FSharp.Data 1.1.10 was released with a bunch of bugfixes.
RProvider 1.0.1 was released with latest R.NET and RDotNet.FSharp inside.
Francesco De Vittori works on type inference for Smalltalk.
Immo Landwerth announced that “Immutable collections are now RC“.

Blogs

Visual Studio FSharp Team posted “Visual Studio 2013 RC and Send to FSI“.
Sergey Tihon blogged “Stanford Word Segmenter is available on NuGet“.
Phil Trelford wrote about “k-means clustering“.
Valdis Iljuconoks posted “Matching the patterns“.
Danny Tuppeny ‏blogged “Opt-in Nulls; an F# Feature Worth Switching For?“.
Jon Harrop wrote
- “Ten F# one-liners to impress your friends“
- “A simple Fast Fourier Transform (FFT)” (another FFT sample code)
- “Color wheel“
Rachel Appel wrote “Understanding Your Language Choices for Developing Modern Apps“.
brianberns posted “F# language warts“.
Kapil Garg shared “FSharp -Top tweets (10/09/2013)“.

That’s all for now. Have a great week.

Previous F# Weekly edition – #36

Stanford Word Segmenter is available on NuGet

09/09/201325/02/2021F#, Machine Learning and NLP2 Comments

Update (2014, January 3): Links and/or samples in this post might be outdated. The latest version of samples are available on new Stanford.NLP.NET site.

Tokenization of raw text is a standard pre-processing step for many NLP tasks. For English, tokenization usually involves punctuation splitting and separation of some affixes like possessives. Other languages require more extensive token pre-processing, which is usually called segmentation.

The Stanford Word Segmenter currently supports Arabic and Chinese. The provided segmentation schemes have been found to work well for a variety of applications.

One more tool from Stanford NLP Software Package become ready on NuGet today. It is a Stanford Word Segmenter. This is a fourth one Stanford NuGet package published by me, previous ones were a “Stanford Parser“, “Stanford Named Entity Recognizer (NER)” and “Stanford Log-linear Part-Of-Speech Tagger“. Please follow next steps to get started:

Install-Package Stanford.NLP.Segmenter
Download models from The Stanford NLP Group site.
Extract models from ’data‘ folder.
You are ready to start.

F# Sample

For more details see source code on GitHub.

open java.util
open edu.stanford.nlp.ie.crf

[<EntryPoint>]
let main argv =
if (argv.Length <> 1) then
printf "usage: StanfordSegmenter.Csharp.Samples.exe filename"
else
let props = Properties();
props.setProperty("sighanCorporaDict", @"..\..\..\..\temp\stanford-segmenter-2013-06-20\data") |> ignore
props.setProperty("serDictionary", @"..\..\..\..\temp\stanford-segmenter-2013-06-20\data\dict-chris6.ser.gz") |> ignore
props.setProperty("testFile", argv.[0]) |> ignore
props.setProperty("inputEncoding", "UTF-8") |> ignore
props.setProperty("sighanPostProcessing", "true") |> ignore

let segmenter = CRFClassifier(props)
segmenter.loadClassifierNoExceptions(@"..\..\..\..\temp\stanford-segmenter-2013-06-20\data\ctb.gz", props)
segmenter.classifyAndWriteAnswers(argv.[0])
0

C# Sample

For more details see source code on GitHub.

using java.util;
using edu.stanford.nlp.ie.crf;

namespace StanfordSegmenter.Csharp.Samples
{
class Program
{
static void Main(string[] args)
{
if (args.Length != 1)
{
System.Console.WriteLine("usage: StanfordSegmenter.Csharp.Samples.exe filename");
return;
}

var props = new Properties();
props.setProperty("sighanCorporaDict", @"..\..\..\..\temp\stanford-segmenter-2013-06-20\data");
props.setProperty("serDictionary", @"..\..\..\..\temp\stanford-segmenter-2013-06-20\data\dict-chris6.ser.gz");
props.setProperty("testFile", args[0]);
props.setProperty("inputEncoding", "UTF-8");
props.setProperty("sighanPostProcessing", "true");

var segmenter = new CRFClassifier(props);
segmenter.loadClassifierNoExceptions(@"..\..\..\..\temp\stanford-segmenter-2013-06-20\data\ctb.gz", props);
segmenter.classifyAndWriteAnswers(args[0]);
}
}
}

F# Weekly #36 2013

09/09/201309/09/2013F# Weekly3 Comments

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

New feature was proposed to F# – Implement interface by expression (example is here)
New F# Cheatsheet in PDF and HTML format using FSharp.Formatting tool was published.
James announced a new F# game Twaddle(FunScript) that is available on Android.
F# User Group Sydney was registered.
Taha Hachana presented “Geolocation Options“.
Canopy was updated up to 0.8.5.

Videos/Presentations

“F# Driver for MongoDB” by Max Hirschorn.
“Functional Programming, F#, Type Providers and Dynamic Languages” by Richard Minerich.
“Windows Phone 7.5 Application Development with F#” by Lohith G.N.

Blogs

Mathias Brandewinder blogged “First steps with Accord.NET SVM in F#“.
Mathias Brandewinder wrote “Field notes from the F# tour“.
Jon Harrop wrote “F# for Visualization update“.
bratfizyk posted “Learning F# – Graph Coloring using Microsoft Solver Foundation“.
Faisal Waris wrote about “Talking to your car – with OpenXC, Android, Xamarin & F#“.
Paulmichael Blasucci blogged “The Month NYC Ran Out of Excuses Not to Learn F#“.
Phil Trelford posted “Try 10 Programming Languages in 10 minutes“.
Christian Horsdal published “Playtime: Riak, Azure, F#“.
Nikos Baxevanis blogged “How to enable Code Analysis for F# projects“.
Kapil Garg wrote “Top Tweets“.
Yan Cui published “Binary and JSON serializer benchmarks updated“.

That’s all for now. Have a great week.

Previous F# Weekly edition – #35

F# Weekly #35 2013

02/09/2013F# Weekly1 Comment

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

Canopy 0.8.0 was released with PhantomJS support.
Brahma.FSharp(F# quotation to OpenCL translator) is available on NuGet.
Will Smith embedded FSI in Quake3 (part 2).
Paris F# User Group was registered and growing up.
Code, build and run – WebSharper mobile apps in CloudSharper
Taha Hachana presented “Native HTML5 Drag & Drop“.

Videos/Presentations

“But we are a C# shop” by ericksoa07.
“Piglets to the rescue” by Loic Denuziere, Ernesto Rodriguez, Adam Granicz.

Blogs

Onorio Catenacci wrote “First Detroit F# Meetup“.
Phil Trelford posted “F# on Android“.
Tomas Petricek shared “Hello New York. Learn some F#!“.
Onorio Catenacci wrote “F# Tip of the Week (26 August 2013)“
Phil Trelford posted “Balls“.
Tomas Petricek shared “Update on the F# Deep Dives book“.
Dmitry Morozov posted “More on “Clarity of Intent”“.
Dmitry Morozov posted “Progressive F# Tutorials Teaser“.
Anton Kropp published “ParsecClone on nuget“.
Phil Trelford wrote “Building a game in a day“.
Mauricio Scheffer shared “Objects and functional programming“.
Mathias Brandewinder blogged “CSV Type Provider, now with more awesome“.
Max Hirschhorn wrote about “Enhancing the F# developer experience with MongoDB“
Sergey Tihon posted “MSR-SPLAT Overview for F#“.

P.S. 100 Most Influential Books According to Stack Overflow.

That’s all for now. Have a great week.

Previous F# Weekly edition – #34

Sergey Tihon's Blog

Running Home Assistant & Matter Server on a UGREEN NAS: A Deep Dive into Thread Device Commissioning

Pi-hole DNS on UGOS PRO 1.6.0.2917

F# Weekly | Behind The Scenes

New IKVM 8.2 & MavenReference for .NET projects

Announcing OpenXML Package Explorer for VS Code

`dotnet watch` with Microsoft.Identity.Web or custom IDistributedCache

ML.NET Recommendation Engine: Pitfall of One-Class Matrix Factorization

Introducing Clippit, get your slides out of PPTX.

HashiCorp Vault and TLS Certificate Authentication for .NET Applications (Comprehensive guide)

Be better WPF / MvvmLight developer in 2018

F# Weekly #41, 2013

F# Weekly #40, 2013

F# Weekly #39, 2013

Dropbox for .NET developers

F# Weekly #38, 2013

F# Weekly #37 2013

Stanford Word Segmenter is available on NuGet

F# Sample

C# Sample

F# Weekly #36 2013

F# Weekly #35 2013